can pass through enemies, get insane avoid, if you keep them as thief they get double bonus from terrain, they stack poison everyturn which can stack to insane levels, daggers have REALLY good damage for some reason??? as well as great dex and speed and alright def too
oh and they for some reason get a mag buff when they class up to wolf knight? so you can use levin sword/magma lance with them too for additional damage type since those are cheap to upgrade